package com.cr.command;

public class RemoteController {

    // 开 按钮的命令数组
    Command[] onCommands;
    Command[] offCommands;
    // 执行撤销命令
    Command undoCommand;

    // 完成对按钮的初始化
    public RemoteController(){
        onCommands = new Command[5];
        offCommands = new Command[5];
        for (int i = 0; i < 5; i++) {
            onCommands[i] = new NoCommand();
            offCommands[i] = new NoCommand();
        }
    }

    // 给按钮设置需要的命令
    public void setCommand(int no, Command onCommand, Command offCommand){
        onCommands[no] = onCommand;
        offCommands[no] = offCommand;
    }

    // 按下打开按钮
    public void onButtonWasPushed(int no){
        // 找到按钮调用对应方法
        onCommands[no].execute();
        // 记录操作，用于撤销
        undoCommand = onCommands[no];
    }

    // 按下打开按钮
    public void offButtonWasPushed(int no){
        // 找到按钮调用对应方法
        offCommands[no].execute();
        // 记录操作，用于撤销
        undoCommand = offCommands[no];
    }

    // 按下撤销按钮
    public void undoButtonWasPushed(){
        undoCommand.undo();
    }

}
